Abstract: The presently disclosed technology teaches using a tilt-sensitive virtual marking implement to render an impression on an electronic presentation device. Further, a bearing measurement and a tilt measurement of the virtual marking implement are made with respect to the surface. The tilt and bearing are then used to vary geometry of an impression profile associated with the physical marking implement as well as an intensity of the rendering. A user may actively vary the impression profile while he or she produces strokes of the virtual marking implement across the surface without changing the physical marking implement selection or switching to a different virtual marking implement. When creating a rendering on a virtual canvas using the virtual marking implement and the surface, a user may wish to vary an orientation of the virtual marking implement so that a corresponding impression profile mimics an impression of a selected physical marking implement.

Abstract: The presently disclosed technology teaches using a tilt-sensitive virtual marking implement to render an impression on an electronic presentation device. Further, a bearing measurement and a tilt measurement of the virtual marking implement are made with respect to the surface. The tilt and bearing are then used to vary geometry of an impression profile associated with the physical marking implement as well as an intensity of the rendering. A user may actively vary the impression profile while he or she produces strokes of the virtual marking implement across the surface without changing the physical marking implement selection or switching to a different virtual marking implement. When creating a rendering on a virtual canvas using the virtual marking implement and the surface, a user may wish to vary an orientation of the virtual marking implement so that a corresponding impression profile mimics an impression of a selected physical marking implement.

Abstract: The presently disclosed technology teaches using a tilt-sensitive virtual marking implement to render an impression on an electronic presentation device. Further, a bearing measurement and a tilt measurement of the virtual marking implement are made with respect to the surface. The tilt and bearing are then used to vary geometry of an impression profile associated with the physical marking implement as well as an intensity of the rendering. A user may actively vary the impression profile while he or she produces strokes of the virtual marking implement across the surface without changing the physical marking implement selection or switching to a different virtual marking implement. When creating a rendering on a virtual canvas using the virtual marking implement and the surface, a user may wish to vary an orientation of the virtual marking implement so that a corresponding impression profile mimics an impression of a selected physical marking implement.

Abstract: A method of determining a tilt, bearing, and/or barrel rotation of a virtual marking implement with respect to a surface is disclosed herein. The tilt, bearing, and/or barrel rotation are used to vary geometry of an impression profile associated with a selected physical marking implement as well as the intensity of a rendering on an electronic presentation device. Further, the impression profile associated with the selected physical marking implement may change over time as marks are rendered on the electronic presentation device. More specifically, a quantity of use of the physical marking implement defines in part the size, orientation, and/or shape of one or more facets on the physical marking implement. Existing facets on the physical marking implement may be modified and/or new facets may be added to the physical marking implement as marks are rendered on the electronic presentation device.

Abstract: A tilt sensitive virtual marking implement is used to render an impression on an electronic presentation device. Further, a bearing measurement and/or a barrel rotation measurement of the virtual marking implement may be made with respect to the surface. The barrel rotation, tilt, and/or bearing are then used to vary geometry of an impression profile associated with a faceted physical marking implement as well as an intensity of the rendering. A user may actively vary the impression profile while he or she produces strokes of the virtual marking implement across the surface without changing the faceted physical marking implement selection or switching to a different virtual marking implement so that a corresponding impression profile mimics an impression of a facet on the faceted physical marking implement.

Abstract: A drawing assistance system enhances a sketch drawn by a user in an electrical document on a computer system by collecting stroke data from one or more strokes of a sketch as a user draws the sketch. The stroke data includes time-based information and features of each stroke. The strokes are handled based on the time-based information, and analysed based on the strokes handled based on the time-based information. The sketch is enhanced based on results of the analysis.